In a lot of my stories there's magic, and favoring men and women equally that would remove a lot of possible discrimination. It wouldnt make much sense to use a man without magic in favor of a woman with magic, so that got them more representation in battle, which often extends to other areas. 

As for chain mail bikini, I do have one character with it where it makes a lot more sense given her situation (wings and tail so she can't wear normal armor, was raised in the wild so doesn't like clothing very much), but pretty much the rest of my characters wear full armor or normal clothing in situations mostly involving magic where amor doesn't help block very well and just slows them down when they need to dodge magic instead or just use magical spells to defend themselves.